YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1921 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1922 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1925 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1926 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1928 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1929 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1930 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1931 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1932 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1935 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1938 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1939 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1940 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1943 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1944 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | 78.79 | f | 87.26 | 95.90 | 96.23 | 92.32 | 84.20 | 77.84 | 59.00 | a | 56.13 | 81.11 | d | |||||||
1962 | 52.00 | 64.71 | 62.13 | 80.03 | 85.68 | 93.20 | 90.77 | 96.06 | 85.97 | 79.06 | 68.73 | 57.65 | 76.33 | |||||||||||||
1963 | 54.13 | 63.25 | 69.45 | 77.93 | 89.03 | 94.03 | 97.26 | 89.55 | 88.83 | 80.52 | 65.93 | 58.16 | 77.34 | |||||||||||||
1964 | 53.35 | 55.90 | 64.52 | 74.07 | 86.26 | 93.07 | 95.68 | 93.55 | 84.10 | 78.77 | 65.00 | 55.03 | 74.94 | |||||||||||||
1965 | 58.48 | 58.64 | 63.87 | 76.77 | 83.71 | 90.87 | 95.58 | 93.26 | 84.23 | 80.00 | 70.27 | 56.03 | 75.98 | |||||||||||||
1966 | 52.26 | 54.36 | 70.10 | 77.37 | 87.26 | 92.73 | 96.61 | 91.42 | 85.77 | 77.13 | 68.87 | 57.65 | 75.96 | |||||||||||||
1967 | 59.84 | 63.36 | 74.29 | 77.77 | 83.97 | 91.60 | 94.84 | 89.52 | 83.97 | 78.90 | 66.93 | 50.84 | 76.32 | |||||||||||||
1968 | 55.61 | 63.38 | 64.61 | 72.77 | 85.32 | 94.70 | 91.29 | 88.39 | 86.83 | 81.48 | 63.77 | 56.94 | 75.42 | |||||||||||||
1969 | 62.32 | 61.07 | 65.26 | 80.07 | 86.35 | 94.10 | 93.97 | 95.94 | 87.90 | 76.81 | 63.33 | 58.84 | 77.16 | |||||||||||||
1970 | 58.45 | 62.54 | 66.13 | 75.17 | 87.13 | 93.47 | 94.10 | 93.03 | 85.07 | 72.39 | 67.77 | 62.13 | 76.45 | |||||||||||||
1971 | 61.45 | 63.11 | 73.19 | 75.77 | 83.90 | 94.77 | 95.94 | 90.71 | 87.40 | 73.06 | 65.50 | 54.87 | 76.64 | |||||||||||||
1972 | 60.48 | 66.79 | 77.94 | 81.07 | 85.71 | 92.93 | a | 95.52 | 89.52 | 85.20 | 76.90 | 60.97 | 57.97 | 77.58 | ||||||||||||
1973 | 52.10 | 56.29 | 63.10 | 72.23 | 84.16 | 94.03 | 93.61 | 93.55 | 90.93 | 81.19 | 69.80 | 60.58 | 75.96 | |||||||||||||
1974 | 58.71 | 61.71 | 74.55 | 78.67 | 89.45 | 98.07 | 91.61 | 89.45 | 82.63 | 74.52 | 64.47 | 53.45 | 76.44 | |||||||||||||
1975 | 55.68 | 60.64 | 66.39 | 72.33 | 84.03 | 95.70 | 92.06 | 93.52 | 83.07 | 80.52 | 68.07 | 60.58 | 76.05 | |||||||||||||
1976 | 59.52 | 66.66 | 70.23 | 77.07 | 84.13 | 94.30 | 91.90 | 91.74 | 82.20 | 69.94 | 59.70 | 56.26 | 75.30 | |||||||||||||
1977 | 54.19 | 63.82 | 64.19 | 73.23 | 79.23 | 93.17 | 94.55 | 96.00 | 90.37 | 77.16 | 69.13 | 61.26 | 76.36 | |||||||||||||
1978 | 56.26 | 58.18 | 69.42 | 79.07 | 84.52 | 96.43 | 99.10 | 92.71 | 82.53 | 77.77 | 62.23 | 53.45 | 75.97 | |||||||||||||
1979 | 51.23 | 62.04 | 68.00 | 78.53 | 83.29 | 93.20 | 98.55 | 91.48 | 88.77 | 84.23 | 63.87 | 60.16 | 76.94 | |||||||||||||
1980 | 60.42 | 63.21 | 66.97 | 75.30 | 83.19 | 100.70 | 97.87 | 92.32 | 87.00 | 73.77 | 64.40 | 64.26 | 77.45 | |||||||||||||
1981 | 55.23 | 65.36 | 65.77 | 79.13 | 85.55 | 96.57 | 96.26 | 92.13 | 87.17 | 77.10 | ----- | z | ----- | z | 80.03 | b | ||||||||||
1982 | ----- | z | ----- | z | 72.45 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 72.45 | k | |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 92.84 | 92.50 | 72.48 | 58.03 | a | 58.10 | 74.79 | g | ||||
2001 | 52.71 | 62.36 | 68.97 | 78.00 | 89.68 | 96.03 | 95.77 | 92.00 | 89.10 | 81.23 | 66.40 | 56.90 | 77.43 | |||||||||||||
2002 | 58.29 | 60.07 | 70.58 | 83.50 | 88.81 | 99.20 | 94.61 | 95.10 | 88.47 | 74.48 | 64.87 | 54.23 | 77.68 | |||||||||||||
2003 | 64.03 | 60.39 | 67.48 | 76.90 | 88.42 | 95.03 | 98.81 | 94.97 | 90.37 | 82.03 | 66.96 | f | 57.06 | 79.59 | a | |||||||||||
2004 | 57.06 | 56.83 | 71.13 | 74.28 | a | 87.68 | 94.07 | 95.06 | 90.13 | 85.10 | 76.03 | 59.23 | 54.94 | 75.13 | ||||||||||||
2005 | 58.13 | 56.79 | 65.42 | 76.80 | 87.58 | 96.45 | a | 98.39 | 91.74 | 91.27 | 76.87 | 69.67 | 61.42 | 77.54 | ||||||||||||
2006 | 61.35 | 65.36 | 69.23 | 81.50 | 90.55 | 96.90 | 94.35 | 87.45 | 80.70 | 74.71 | 69.27 | 56.55 | 77.33 | |||||||||||||
2007 | 51.10 | 63.46 | 72.13 | 77.47 | 84.97 | 95.80 | 94.71 | 93.87 | 87.83 | 80.84 | 69.20 | 56.06 | 77.29 | |||||||||||||
2008 | 55.45 | 64.89 | b | 70.26 | 77.57 | 85.45 | 96.87 | 89.61 | 88.84 | 83.67 | 79.06 | 67.07 | 58.81 | 76.46 | ||||||||||||
2009 | 61.26 | 66.32 | 71.19 | 76.27 | 87.83 | a | 91.10 | 98.06 | 95.19 | 86.60 | 75.61 | 67.73 | 53.61 | 77.57 | ||||||||||||
2010 | 53.53 | a | 57.57 | 66.19 | 75.13 | 85.42 | 97.36 | b | 93.29 | 93.45 | 91.07 | 79.68 | 66.11 | b | 63.16 | 76.83 | ||||||||||
2011 | 57.35 | 60.11 | 75.45 | 81.37 | 84.68 | 99.37 | 96.74 | 96.74 | 89.63 | 78.81 | 63.33 | 49.27 | a | 77.74 | ||||||||||||
2012 | 61.26 | 61.75 | a | 71.10 | 81.27 | 87.84 | 99.20 | 93.87 | a | 95.48 | 87.10 | 81.48 | 70.55 | a | 58.03 | 79.08 | ||||||||||
2013 | 52.58 | 58.71 | 72.71 | 79.43 | 85.84 | 100.30 | 92.66 | b | 91.10 | 85.00 | 77.48 | 63.80 | 55.81 | 76.28 | ||||||||||||
2014 | 61.55 | 68.29 | 70.77 | a | 77.40 | 85.16 | 98.47 | 95.97 | 89.68 | 84.03 | 79.52 | 64.73 | 58.03 | 77.80 | ||||||||||||
2015 | 54.39 | 67.14 | 71.16 | 76.30 | 82.90 | 96.07 | 92.48 | 96.16 | 89.07 | 77.37 | a | 65.00 | 56.71 | 77.06 | ||||||||||||
2016 | 55.48 | 67.90 | 73.94 | 76.67 | 84.84 | 96.82 | b | 99.61 | 90.29 | 86.62 | a | 83.90 | 66.83 | 58.26 | 78.43 | |||||||||||
2017 | 56.35 | 65.79 | 76.10 | 80.03 | 85.81 | 98.03 | 94.42 | 90.35 | 89.03 | a | 81.16 | 74.37 | 60.94 | 79.37 | ||||||||||||
2018 | 60.68 | 64.93 | 71.42 | 81.53 | 90.94 | 98.30 | 95.10 | 94.74 | 88.83 | 71.94 | 64.33 | 56.32 | 78.25 | |||||||||||||
2019 | 57.52 | 60.71 | 69.61 | 78.43 | 82.58 | 94.83 | a | 98.06 | 96.77 | 87.77 | 75.94 | 64.87 | 55.71 | 76.90 | ||||||||||||
2020 | 59.52 | b | 60.07 | 67.77 | 79.20 | 90.74 | 97.33 | 100.17 | a | 100.89 | d | 87.89 | c | 85.07 | a | 71.23 | 57.16 | 79.75 | ||||||||
2021 | 57.71 | 64.00 | 68.55 | 79.17 | 89.06 | 96.57 | 93.32 | 92.23 | 88.60 | 79.29 | 71.03 | 62.94 | 78.54 | |||||||||||||
2022 | 57.87 | 60.86 | 69.61 | 82.40 | 90.81 | 95.10 | 97.29 | 89.81 | 89.10 | 72.77 | 62.97 | 58.19 | 77.23 | |||||||||||||
2023 | 57.06 | 59.64 | 68.03 | 79.83 | 87.00 | 95.57 | 103.26 | 97.00 | 93.30 | 81.06 | 67.20 | 59.84 | 79.07 | |||||||||||||
2024 | 57.13 | 64.34 | 67.77 | 74.89 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 63.08 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 57.07 | 62.12 | 69.31 | 77.79 | 86.22 | 95.64 | 95.43 | 92.73 | 87.04 | 77.95 | 65.94 | 57.51 | 77.06 | |||||||||||||
S.D. | 3.35 | 3.45 | 3.64 | 2.74 | 2.55 | 2.39 | 2.76 | 2.81 | 2.91 | 3.47 | 3.59 | 3.11 | 1.14 | |||||||||||||
SKEW | -0.04 | -0.27 | 0.16 | -0.17 | -0.03 | 0.09 | 0.31 | 0.44 | -0.04 | -0.20 | -0.16 | -0.13 | 0.38 | |||||||||||||
MAX | 64.03 | 68.29 | 77.94 | 83.50 | 90.94 | 100.70 | 103.26 | 100.89 | 93.30 | 85.07 | 74.37 | 64.26 | 79.75 | |||||||||||||
MIN | 51.10 | 54.36 | 62.13 | 72.23 | 79.23 | 90.87 | 89.61 | 87.45 | 80.70 | 69.94 | 58.03 | 49.27 | 74.94 | |||||||||||||
YRS | 44 | 44 | 45 | 43 | 44 | 44 | 44 | 45 | 45 | 45 | 43 | 44 | 41 |